Improvement in tools for manufacturing knitting-burs



NITED STATES PATENT OFFICE.,

HORAOE FISHER, OF WATERFORD, ASSIGNOR TO HIMSELF AND FULLER St SAFELY,OF COHOES, NEW YORK.

IMPROVEMENT IN TOOLS FOR MANUFACTURING KNlTTlNG-BURS.

Specification forming part of Letters Patent No. 40,587, dated November10, 1863.

To all whom it may concern.-

Beit known that I, HORACE FISHER, of the town of Waterford, Saratogacounty, State of New York, have invented a new and useful Tool to beEmployed in Manufacturing Knitting-Burs5 and I declare the followingspecification, with the drawings forming part of it, to be a full andcomplete description of my lnvention.

Figures l, 2, and 3 represent the form and construction of aknitting-bur; Fig. 4, the tool for making the bur, and Fig. 5, asectional View showing the construction and operation of the tool.

Similar letters in the different figures denote the same parts of theapparatus.

The knitting-bur is a welLknoWn part of the machinery of knitting-looms,employed in the formation of the stitch, and is constitutedas showninFig. l, of a small metal cylinder, A, prolonged into a neck, B, with anorice through its axis, through which, when on the maehine,a fixed axleruns, upon which it revolves'. It has a portion of its periphery turneddown into a groove, so as to leave a low ange on both edges of thecylinder. Across the'cylinders face oblique slots a a are cut throughJdie flanges and also just dipping into the surface of the face betweenthem. Into these slots are set wings of thin steel, which, whencompleted, are shaped like O, but

in the process of forming the bur are oblong,

as shown at D. These pieces are slipped into the slots, and are thenfixed permanently therein by soldering. Then the apparatus is put into alathe, and the edges of the Wings turned down from the form shown at Dto that shown at O, the bur, when completed, appearing in profile asshown in Fig. 2, and edgewise as in Fig. 3. In doing this, as the metalis left soft to allow of this turning down, the wings will of necessitybe bent more or less out of shape, so as to require after the turning acareful adj ustmcnt of them, in order to preserve their intervals trueand surfaces flat and regular, an operation requiring very considerableexpense of labor and time.

The object of my improvement is to save this expense, and consists,first, in the employment of win gs punched out of thin steel, andhardened, (instead 0f using soft metal,) of the proper form whencomplete, like C.

The Wings are inserted into the soldered to the cylinder. N ow, it isnecessary that these wings should be placed in their relative positionswith the greatest accuracy, for, being of hard metal, they cannot berectified by turning or filing. My tool, the subject of this invention,is intended to perform this service, and is constructed as shown inFigs. 4 and 5. E is a metal spindle having at one end a head or button,G, a trie larger in diameter than the cylinder A, and on the other ascrew-thread. A follower or collar is fitted to slide upon the neck Bofthe cylinder, being a cylinder, K, expanded at one end into a cup orflange, H, large enough in diameter to project beyond A, and by itsconcave or curved rim at b to fit accurately against the edges of theWings. The follower, when in place, projects beyond the neck B, so thata nut, N, being screwed upon the end of E, by pressing upon the end ofK, will force H firmly against the wings G, and press them home to theirproper position upon the surface of A. It is manifest that being heldfirmly between the button G and the curved and fitting rim atb, thewings, if accurately made, must be held exactly in their true positions.It becomes then only necessary to slip the wings into their slots uponthe cylinder, andA then applying the tool to screw up the nut, which atone operation will bring every wing toits true position in reference tothe others without requiring a separate adjustment of each one. Thisdone, the solder is applied and the bur is completed.

This tool, by performing at one prompt operation the placing of theWings accurately and holding them in their places, dispenses with theprocess of turning down the Wings to shape and the adjustment of eachwing separately, and thus permits the use of hardcned steel for thewings, instead of soft metal, combining the saving of time and labor inconstructing the bur, with the use of a much more durable metal for thewings.

The tool can be used without the follower by drawing up the button Gagainst A, by screwing the nut N against the end ofneck B. The Wingsafter insertion can then be driven up with a hammer against Gr, and soadjusted to their places, and may remain there during the slots a, to beprocess of soldering, provided each Wing fits its groove tightly; butthis process., although button G, screw and nut N, With a follower,

a saving as compared With the old process, K, and collar H,substantially as described,

does not complete thework as advantageously and for the purposes setforth.

as does the use of the complete apparatus. HORACE FISHER.

VVhatI claim as my invention, and desire to Witnesses:

secure by Letters Patent, is E. J. MILLER,

The combination of a spindle, E, and its RICHD. VARICK DE WITT.

